package bigPack.utils;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;

import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

public class JdbcUtils {
    private static DruidDataSource dataSource;
    static {


        try {
            Properties properties=new Properties();
            //读取Jdbc.properties属性配置文件
            InputStream inputStream =JdbcUtils.class.getClassLoader().getResourceAsStream("jdbc.properties");
        //从流中加载数据
        properties.load(inputStream);
            //创建数据库连接池
        dataSource=(DruidDataSource) DruidDataSourceFactory.createDataSource(properties);
    }catch (Exception e){
        e.printStackTrace();
    }
    }



//如果返回null，说明连接失败，有值就是连接成功
    public static Connection getConnection(){
        Connection conn=null;
        try {
            conn=dataSource.getConnection();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }
    public static void close(Connection conn){
        if(conn !=null){
            try {
                conn.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
}
